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I leave Firefox installed, but I download and use Chrome. Chrome is much faster than Firefox in many websites I use (not only youtube where Google might be using a secret sauce, but also Photopea and other js-heavy websites). Also, Chrome is using way less RAM than Firefox. I have a bunch of older laptops with 4 GB of RAM, so these "small" differences in speed between the two browsers is VERY evident on these older computers (not so easily seen on very fast PCs). Many people don't like me writing all that, and often downvote me for having written that in the past, but it's god's honest truth. I looked into installing a totally degoogled chromium, but it's not updated asap for security updates, so it's a no-go for me.
I also prefer VLC for videos, and OnlyOffice instead of LibreOffice (better MS compatibility). Also, because it's Linux Mint and comes preinstalled with warpinator, I prefer LocalSend instead of Warpinator. Easier to use.
Edit: just as predicted, downvotes. People seem to prefer a live in a lie. Do your own tests guys before you press the trigger!